Golf 1J Radio Issues: Troubleshooting Guide (KW 43/98) (Solution)

Antenna for radio, telephone, and navigation systems.
Poor radio reception.
Poor MW reception, significantly worse FM reception.

Cause:
Due to water ingress into the plastic housing of the antenna amplifier, corrosion occurs, which increases the contact resistance between the contact spring on the circuit board and the threaded bushing.

Solution:
Adjust the medium wave radio frequency. Touch the antenna rod in the area of its thickening. Gently pull or push the antenna rod. If the reception changes significantly, the amplifier is defective and must be replaced.

Sure, here is the translation of the text from German to English:

"Note:"
The exam should be conducted outdoors.